Alliance ?? / numerous phone calls

We continue to receive numerous phone calls (up to 3 per day) from some collector (sounds like Estimay Alliance but I never hear it clearly). I received 12 phone calls in one week. The calls are automated (no live person), it says "If you are the adult consumer in the household, please listen to this message, if you are not the adult consumer of the household, please hang up..." I called back the first time and told them they had the wrong household (only same last name) and to not call again. I got charged for the phone call and the calls are still continuing. Since these are 866 numbers, I cannot block them from my phone. I run out of room on my message recorder and then miss calls I need to get. Please tell these people to stop calling me.